Compound as reactive (1)

(S)-4-hydroxy-2-oxopentanoate → (2Z)-2,4-dihydroxypent-2-enoate

Compound as product (1)

(S)-4-hydroxy-2-oxopentanoate ← H₂O + (2Z)-2-hydroxypenta-2,4-dienoate

Reversible reaction (3)

H₂O + 2-oxopent-4-enoate ↔ (S)-4-hydroxy-2-oxopentanoate

H₂O + (2E)-2-hydroxypenta-2,4-dienoate ↔ (S)-4-hydroxy-2-oxopentanoate

(S)-4-hydroxy-2-oxopentanoate ↔ pyruvate + acetaldehyde